One day, Tsuyoshi Mukohda, an extremely ordinary salaryman, gets caught up in a hero summons being performed in another world. At the time of his summoning, he receives a unique skill known as "Online Grocery", that allows him to bring food ingredients and seasonings from his original world. Even though this skill seems plain at first glance, the food he brings into this new world has an absurd effect...!?

After the legendary wolf monster Fenrir got attracted to the delicious smell of Mukohda's food and signed the Familiar Contract with him, Mukohda decides to register with the Guild in Fallières his next stop.

After registering with both the Merchant's and the Adventurer's Guilds, Mukohda immediately decides to take on a beginner’s quest. However, when they deliver the monsters that Fel caught during their quest to the Guild, they find out that most of these monsters are B-rank or higher.

Mukohda asks Fel to teach him how to use magic after witnessing his wind magic. However, when things do not seem to go well, Fel decides to start a Spartan training regimen for him.

Mukohda and Fel arrive at a large lake, where they catch some fish and have their usual meal. But right when they start eating inside the barrier that keeps monsters at bay, a baby slime appears out of nowhere...?

The place Fel decides to bring Mukohda to get some battle experience ends up being a creepy dungeon. Even so, Mukohda gets ready for battle and increases his stats by eating a meal from his original world using the “Online Grocery”. However...

Mukohda and his familiars dash through the forest, after strengthening their bonds in the dungeon. However, they soon find themselves in the territory of dangerous monsters and, just like Mukohda expected, surrounded by a pack of orthros...

Mukohda gets summoned by the guild master after defeating an entire settlement of goblins while finishing a guild request. Although Mukohda didn't want to make a big deal out of it, he receives a high-ranking quest directly from the guild master...?

Mukohda and his familiars receive a request to head towards a mine and hunt down the metal lizard that inhabits it. Instead, they run into a rare mithril lizard. After Mukohda defeats the lizard, with the help of Fel and Sui, Fel turns his interest towards a different and tastier prey...?

Lambert consults Mukohda about a gift for his wife. When Mukohda suggests a certain product he purchased from the online grocery, it leads to an unexpected situation. Meanwhile, a pack of dangerous monsters, called wyverns, are approaching the town...?